i dont have a barrel yet for the new mag, and i dont have air so i cant test it out either... i 'milled' my classic rail. in the pics its right after preliminary hacksaw job and i havent gotten a chance to smooth things out yet. its pretty darn light tho at 2.8 ounces as compared to the rt rail at 9 ounces. i forgot to weigh it before i hacked it so i can tell u how much i took off lol. i plan to paint it black like it was originally, or paint the rail blue and body black